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A method for direct hot rolling of continuous casting slabs into hexagonal stainless steel coils
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A technology of stainless steel and continuous casting billet, applied in the direction of roll, metal rolling, metal rolling, etc., can solve the problems of high manufacturing cost, long cycle, complicated hexagonal steel process, etc., and achieve low manufacturing cost, short production cycle, high production The effect of cycle shortening
Active Publication Date: 2021-01-05
ZHEJIANG RUIPU TECH
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Problems solved by technology
The production of hexagonal steel by the above two processes has the disadvantages of complex process, long cycle and high manufacturing cost.
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Embodiment 1
[0021] In this embodiment, the continuous casting slab is hot-rolled into a hexagonal stainless steel coil, and then the surface scale is removed through solution heat treatment and pickling. The coil can be directly drawn once to produce a finished hexagonal stainless steel coil.
[0022] A production process for forming hexagonal stainless steel coils by direct hot rolling of continuous casting slabs, based on a forming pinch device, including pass patterns compatible with hexagonal steel (such as figure 2 shown) and pinch rollers (such as image 3 as shown, image 3 The angle of part A is 120°, and the angle of part B is 15°), such as figure 1 shown, including the following steps:
[0023] In the first step, the raw materials are first smelted in an electric arc furnace, refined in an AOD furnace, and refined in an LF furnace to produce a continuous casting billet, such as figure 1 As shown, the molten steel is initially smelted in the electric arc furnace, then refined...
Embodiment 2
[0027] In this embodiment, the continuous casting slab is hot-rolled into a hexagonal stainless steel coil, and then the surface scale is removed through solution heat treatment and pickling. The coil can be directly drawn once to produce a finished hexagonal stainless steel coil.
[0028] A production process for forming hexagonal stainless steel coils by direct hot rolling of continuous casting slabs, based on a forming pinch device, including pass patterns compatible with hexagonal steel (such as figure 2 shown) and pinch rollers (such as image 3 as shown, image 3 The angle of part A is 120°, and the angle of part B is 15°), such as figure 1 shown, including the following steps:
[0029] In the first step, the raw materials are first smelted in an electric arc furnace, refined in an AOD furnace, and refined in an LF furnace to produce a continuous casting billet, such as figure 1 As shown, the molten steel is initially smelted in the electric arc furnace, then refined...
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Abstract
The invention discloses a method for directly hot-rolling a continuous casting blank into a hexagonal stainless steel coil. The method is based on a forming pinching device. A hole pattern matched with hexagonal steel, and a pinch roll are included. firstly, raw materials are subjected to primary smelting with an electric-arc furnace, AOD refining and LF furnace refining to produce the continuouscasting billet; after molten steel primary smelting in the electric-arc furnace, AOD refining and LF furnace refining sequentially, components and temperature of molten steel reach product design target requirements, the continuous casting billet of 180 square meters is produced by a billet continuous caster; and the produced continuous casting billet is used for hot rolling, and the cut length ofthe continuous casting billet is set to be 7-7.5 m according to the product design requirement; secondly, after heated, the continuous casting billet is subjected to high temperature rolling by a short-stress rolling mill and then subjected to high temperature curling forming, and a large hexagonal stainless steel coil is obtained; and thirdly, the large hexagonal stainless steel coil is subjected to high temperature solution heat treatment of 1000-1100 DEG C, the large hexagonal stainless steel coil obtained after solution treatment is subjected to related procedures of pre-pickling, mixed pickling, washing, passivation and neutralization, and the acid white hexagonal stainless steel coil is generated.
Description
technical field [0001] The invention discloses a method for directly hot-rolling a hexagonal stainless steel coil by using a continuous casting slab, and relates to the technical fields of iron and steel smelting, rolling, heat treatment, pickling and the like in the metallurgical industry Background technique [0002] Hexagonal stainless steel can be used not only in various architectural structures, but also in engineering structures, such as houses, bridges, transmission towers, and warehouse shelves, and other industries, playing their different roles. At present, the domestic production of hexagonal steel mainly includes: 1. Hot-rolling the cast slab into a stainless steel disc, and then producing the hexagonal steel through the process of "two pulls and one retreat"; 2. Hot-rolling the cast slab into a stainless steel round bar. Then the round bar is transformed into a hexagonal bar through multiple passes of rolling, and then pickling-grinding-drawing-annealing and ot...
Claims
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